US1583341A - Propeller or blower - Google Patents

Description

y I i C. DECRETTE PROPELLER OR BLOWER Filed July 19 1924 INVENTOR r I LZDecreIte v BY ATTORNEY Patented May 4, 1926.

CHARLES 'nncnn'rrn, or nnw Yams. Y. a

rnornrnnn on BLowEn.

T 0 all whom it may concern:

' Be it known that 1, CHARLES Dncnn'rrn, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Propellers or Blowers, of which the following is a specification.

7 he main object of this invention is to provide a propeller which also maybe efficiently used as a blower. The device when used as a propeller decreases thehead re sistance to a minimum. The propeller is.

constructed in the form ofa whirling drum with blades set at a slight angle.

Another object is to providemeans on the propeller or blower whereby all the blades, which are independently mounted, may have their pitch varied in unison.

These and other'objects will become apparent in the description below, in which characters of reference refer to like-named.

parts in the drawing. 7

Referring briefly to the drawing, Figure 1 is a front elevational view of the device.

Figure 2 is a longitudinal sectional elevational view of the same.

Figure 3 is a rear and elevational view of Figure 1.

Figure 4 is a partly sectioned side elevational view of the blade adjuster ring.

Figure 5 is a front elevational View of Figure 4.

Figure 6 is a perspective View of a section of the device showing the method of moving the blades.

Referring 1n detail to the drawing, the

numeral 10 indicatesthe circular wall of acylinder. Said :cylinder is open at "both ends and at its forward end a plurality of ribs 11 extend outwardly and toward the axis of the cylinder. The adjacent ends of the ribs join each other at a common vertex, and at the latter position a sleeve 12 is fixed to the ribs. The sleeve hasa longitudinal opening therein in which one end of'a shaft 13 is rotatably journalled; said shaft being adapted to be rotated by a source of power such as a motor, not shown, together with the remainder of the device. The shaft is supported near both its ends on brackets 14 which are mounted on a frame 15, the latter serving as a support for the entire device. At the rear of the cylinder a ring 16 encircles the interior of the cylinder and is per- Application filed iuiyl s, 924. serial mvasea manently secured in place by rivets'or the like. A, hollowhub -'17 having faces 18, is

mounted on'the shaft, one of said faces be ing removable so thlat the blade adjusting (i0 mechanism may be mounted in the chamber 19. The annular space between the ring16' and the hub 17 is utilized by a plurality of j blades 20 which are curved longitudinally V and are pivoted at one end on a pin which is anchored on the hub and passes thru one of the webs 21 of the blade at one corner thereof. The same web at the opposite corner has a pin 22 which extends thru a rectangular opening23 cut into the peripheral wall of the hub. Within the chamber 19 of the hub, a blade adjuster ring 24 is rotatably mounted. Said ring has an internal periphery on which gear teeth 25. are formed and the external periphery has a plurality of angular channels 26in which the ends of the pins 22, which-project thru the opening 23 of the hub, register. A thumbscrew 27 is rotatably mounted in the outer wall 18 of the hub and has a shank thereon which passes thru said wall18 into the chamber 19 in which a pinion 28 is located. The pinion is rigidly mounted on the shank of member 27 and meshes with the teeth 25 of the blade adjuster ring 24.

In using the device as a propeller or blower, the shaft 13 on which the entire device-is mounted, is coupled to a motor or 'the like, or any device which will transmit rotation of the shaft, said'ineans not being shown on the drawing. When using the de- Vice as a blower, air enters thru the openings'between the bladesv 20, as the latter where they overlap each other, are spaced apart. When using this device as a blower, the opposite end of the hub would be anchored Within a room 'or chamber, and'the other end in which the blades 20 are mounted, would be exterior of the chamber or room. The amount of air drawn in by the blades may be varied thru adjustment of the blades. Adjustment of the blades is accomplished by rotation of the thumb screw 27. As the pinion 28 is rigidly attached to the shank of the thumb screw and meshes with the adjuster ring 24, the latter 22 at one of its ends engaged in an inclined channel 26 will be moved transversely or substantially parallel to the axis of the shaft 13 and thus decrease or increase the space will be rotated. Each blade having a pin of each adjacent pair of blades, the entire blades being moved in unison by the adjuster ring 24 in either direction.

I claim In a blower or propeller, a cylindrical body open at both ends, a plurality of blades mounted in said body, said blades being curved longitudinally to conform to the pe riphery of thebody, the; blades being normally inclined to provide a space between each pair of blades at adjacent ends, the ends of said blades overlapping in spaced-apartstaggered relation, an annular hub supporting said blades on its periphery, said hub having openings at the free ends of said blades, a pin on the free end of each blade passing thru the opening in the hub, an adjuster ring rotatable in said hub and having inclined channels formed on its periphery, the pins on the free ends of said blades being adapted to register 1n said channels, said ring when rotated being adapted to swing the blades about the fixed pivot, and means for rotating said adjuster ring. 7 l v In testimony whereof I affix my signature.

CHARLESDEGRETTE.

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